<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <style>
      h1 {
        text-align: center;
        font-size: 60px;
        color: red;

        /* text-shadow: 3px 3px;
        text-shadow: 3px 3px red;
        text-shadow: 3px 3px 10px red; */

        text-shadow: 2px 2px 10px #000;
      }
    </style>
  </head>

  <body>
    <h1>你好啊</h1>
  </body>
</html>
